Field of the Invention
[0001] The present invention relates to a delivery device for a medication, and more particularly,
to medical delivery devices and apparatus with a dispensing mechanism having a vibration
and/or noise reducing component.
Background
[0002] Diabetes is a group of diseases characterized by high levels of blood glucose resulting
from the inability of diabetic patients to maintain proper levels of insulin production
when required. Persons with diabetes will require some form of daily insulin therapy
to maintain control of their glucose levels. Diabetes can be dangerous to the affected
patient if it is not treated, and it can lead to serious health complications and
premature death. However, such complications can be minimized by utilizing one or
more treatment options to help control the diabetes and reduce the risk of complications.
[0003] The treatment options for diabetic patients include specialized diets, oral medications
and/or insulin therapy. The main goal of diabetes treatment is to control the diabetic
patient's blood glucose or sugar level. However, maintaining proper diabetes management
may be complicated because it has to be balanced with the activities of the diabetic
patient.
[0004] For the treatment of type 1 diabetes, there are two principal methods of daily insulin
therapy. In the first method, diabetic patients use syringes or insulin pens to self-inject
insulin when needed. This method requires a needle stick for each injection, and the
diabetic patient may require three to four injections daily. The syringes and insulin
pens that are used to inject insulin are relatively simple to use and cost effective.
[0005] Another effective method for insulin therapy and managing diabetes is infusion therapy
or infusion pump therapy in which an insulin pump is used. The insulin pump can provide
continuous infusion of insulin to a diabetic patient at varying rates in order to
more closely match the functions and behavior of a properly operating pancreas of
a non-diabetic person that produces the required insulin, and the insulin pump can
help the diabetic patient maintain his/her blood glucose level within target ranges
based on the diabetic patient's individual needs.
[0006] Infusion pump therapy requires an infusion cannula, typically in the form of an infusion
needle or a flexible catheter, that pierces the diabetic patient's skin and through
which, infusion of insulin takes place. Infusion pump therapy offers the advantages
of continuous infusion of insulin, precision dosing, and programmable delivery schedules.
[0007] In infusion therapy, insulin doses are typically administered at a basal rate and
in a bolus dose. When insulin is administered at a basal rate, insulin is delivered
continuously over 24 hours in order to maintain the diabetic patient's blood glucose
levels in a consistent range between meals and rest, typically at nighttime. Insulin
pumps may also be capable of programming the basal rate of insulin to vary according
to the different times of the day and night. In contrast, a bolus dose is typically
administered when a diabetic patient consumes a meal, and generally provides a single
additional insulin injection to balance the consumed carbohydrates. Insulin pumps
may be configured to enable the diabetic patient to program the volume of the bolus
dose in accordance with the size or type of the meal that is consumed by the diabetic
patient. In addition, insulin pumps may also be configured to enable the diabetic
patient to infuse a correctional or supplemental bolus dose of insulin to compensate
for a low blood glucose level at the time when the diabetic patient is calculating
the bolus dose for a particular meal that is to be consumed.
[0008] Insulin pumps advantageously deliver insulin over time rather than in single injections,
typically resulting in less variation within the blood glucose range that is recommended.
In addition, insulin pumps may reduce the number of needle sticks which the diabetic
patient must endure, and improve diabetes management to enhance the diabetic patient's
quality of life.
[0009] Typically, regardless of whether a diabetic patient uses multiple direct injections
(MDIs) or a pump, the diabetic patient takes fasting blood glucose medication (FBGM)
upon awakening from sleep, and also tests for glucose in the blood during or after
each meal to determine whether a correction dose is required. In addition, the diabetic
patient may test for glucose in the blood prior to sleeping to determine whether a
correction dose is required, for instance, after eating a snack before sleeping.
[0010] To facilitate infusion therapy, there are generally two types of insulin pumps, namely,
conventional pumps and patch pumps. Conventional pumps require the use of a disposable
component, typically referred to as an infusion set, tubing set or pump set, which
conveys the insulin from a reservoir within the pump into the skin of the user. The
infusion set consists of a pump connector, a length of tubing, and a hub or base from
which a cannula, in the form of a hollow metal infusion needle or flexible plastic
catheter extends. The base typically has an adhesive that retains the base on the
skin surface during use. The cannula can be inserted into the skin manually or with
the aid of a manual or automatic insertion device. The insertion device may be a separate
unit required by the user.
[0011] Another type of insulin pump is a patch pump. Unlike a conventional infusion pump
and infusion set combination, a patch pump is an integrated device that combines most
or all of the fluidic components, including the fluid reservoir, pumping mechanism
and mechanism for automatically inserting the cannula, in a single housing which is
adhesively attached to an infusion site on the patient's skin, and does not require
the use of a separate infusion or tubing set. A patch pump containing insulin adheres
to the skin and delivers the insulin over a period of time via an integrated subcutaneous
cannula. Some patch pumps may wirelessly communicate with a separate controller device
(as in one device sold by Insulet Corporation under the brand name OmniPod®), while
others are completely self-contained. Such devices are replaced on a frequent basis,
such as every three days, when the insulin reservoir is exhausted or complications
may otherwise occur, such as restriction in the cannula or the infusion site.
[0012] As patch pumps are designed to be a self-contained unit that is worn by the diabetic
patient, it is preferable to be as small as possible so that it does not interfere
with the activities of the user. Thus, in order to minimize discomfort to the user,
it would be preferable to minimize the overall thickness of the patch pump. However,
in order to minimize the thickness of the patch pump, its constituent parts should
be reduced as much as possible. One such part is the insertion mechanism for automatically
inserting the cannula into the user's skin.
[0013] To minimize the height of the insertion mechanism, conventional insertion mechanisms
are generally configured to insert the cannula at an acute angle from the surface
of the skin, e.g. 30-45 degrees. However, it is generally preferable to insert the
cannula perpendicular or close to the perpendicular from the surface of the skin since
this would require the minimum length of cannula insertion. In other words, with the
minimum length of cannula being inserted into the user's skin, the user can experience
greater comfort and fewer complications, such as premature kinking of the cannula.
[0014] A common problem or concern with patch pumps and other electrically operated drug
delivery devices is the vibration and noise produced during operation of the pump
mechanism. The movement of the motor and pump mechanism can result in vibrations that
can be perceived by the user when attached to the skin and can produce audible sounds
that can be heard by others.
[0015] Accordingly, a need exists for an improved delivery device for use in a limited space
environment, such as in the patch pump, that can reduce the vibration and sounds emitted
by the device during use without interfering with the normal operation of the device.
Summary
[0016] One aspect of the present invention is a delivery device, such as a patch pump, catheter
device, infusion pump, or other delivery device for delivering a substance to a patient.
The substance can be insulin, drugs, or pharmaceutical. The delivery device has movable
components and is constructed to reduce or dampen the vibration and/or noise produced
by mechanical components of the device during use. The device in one embodiment is
a patch pump or other delivery device where the mechanical components of the delivery
device that are responsible for producing vibrations and/or noise are isolated or
shielded by a noise reducing component. The noise reducing component is a vibration
and/or noise dampening member to inhibit vibrations and noise from transferring to
the base or housing of the device. In one embodiment the noise dampening member is
formed from a noise dampening material positioned between the base and/or housing
and the mechanical component of the delivery mechanism. In other embodiments, the
noise dampening member can be provided on other locations in or on the base or at
selected locations on the inner surface of the housing. The noise dampening member
can be oriented on a surface within the cavity formed by the base and cover or on
an outer surface of the device in an area to dampen noise from components of the device.
[0017] The aspects of the present invention are achieved by providing delivery device, such
as a catheter delivery device, having a housing, base with a noise reducing component,
and mechanical components for delivering the pharmaceutical or drug to a patient through
a cannula, where the cannula can be steel cannula or flexible catheter. In one embodiment,
the base includes at least one selected area on the top face of the base with a vibration
and/or noise dampening material between the base and the mechanical component. The
mechanical components of the delivery device are isolated or shielded from the base
and housing by the vibration and/or noise dampening material to inhibit vibrations
and noise from transferring from the mechanical components to the base or housing.
The vibration and/or noise dampening material is oriented and configured to reduce
and minimize the perceived noise level and vibration produced by the mechanical components
during use.
[0018] The various aspects of the present invention are also achieved by providing a method
of constructing a delivery device by providing a noise reducing component from a vibration
and/or noise dampening material between the mechanical components and the base and/or
housing of the delivery device.
[0019] The various aspects of the present invention are also achieved by providing a delivery
device such as a catheter delivery device, including a housing and a base coupled
to the housing and enclosing mechanical components of the delivery device. The mechanical
components can include a pump mechanism and gearbox for operating the pump, and a
motor for driving the gear box and pump mechanism. The base is configured for supporting
the pump mechanism, a catheter and catheter insertion mechanism, and a drive motor
connected to a suitable power source such as a battery for driving the pump mechanism.
The base has at least one and typically more than one supporting area for the pump,
motor and other moving components of the pump mechanism. A vibration and/or noise
dampening material is provided in the supporting area between the base and the mechanical
component to dampen vibration and noise through the base and housing. In one embodiment,
the vibration and/or noise dampening material can be an elastomeric polymer applied
to the supporting area of the base.
[0020] In one embodiment, the delivery device is a catheter infusion pump assembly having
a housing and a base coupled to the housing and defining a cavity. The base has a
top face in the cavity and a bottom face. The bottom face is configured for contacting
the skin of the patient during use with the catheter inserted into the patient at
the infusion site. At least one vibration and noise dampening material is provided
in or on the top face of the base. At least one mechanical component of the pump mechanism
of the pump assembly is coupled to the top face of the base and can be positioned
over or proximate the noise dampening member or spaced from the noise dampening member.
The vibration and noise dampening material in one embodiment can be provided in one
or more selected locations where the mechanical components of the pump assembly are
mounted to absorb vibrations and inhibit vibrations and noise in the base and housing.
The vibration and noise dampening member is oriented between the mechanical component
and the base. In other embodiments, the noise dampening member can be positioned between
the mechanical components and the housing to absorb noise and vibration from the mechanical
components.
[0021] In one embodiment of the invention, the noise dampening member can be a sheet material
or a separately formed member that is applied to a surface of the device and attached
to the device in a fixed position. The noise dampening member can have a suitable
shape and dimension to cover a selected area of the device and can have an adhesive
or mastic layer applied to one side for attaching the noise dampening member to the
device. The noise dampening member can have a shape and dimension to cover all or
a selected portion of the top face of the base or to the cover. The noise dampening
member can be attached a suitable surface within the device or on an outer surface
of the device.
[0022] Additional and/or other aspects and advantages of the present invention will be set
forth in the description that follows, or will be apparent from the description, or
may be learned by practice of the invention.
Brief Description of the Drawings
[0023] The above and/or other aspects and advantages of embodiments of the invention will
be more readily appreciated from the following detailed description, taken in conjunction
with the accompanying drawings, in which:
Fig. 1 is a perspective view of a delivery device shown as a patch pump incorporating
a low-profile cannula insertion device, illustrated with a transparent cover for clarity;
Fig. 2 is an exploded view of the various components of the delivery device of Fig.
1, illustrated with a cover;
Fig. 3 is a perspective view of an alternative design for a patch pump having a flexible
reservoir, illustrated without a cover;
Fig. 4 is a patch-pump fluidic architecture and metering sub-system diagram of the
patch pump of Fig. 3;
Fig. 5 is perspective view of a delivery device in another embodiment of the invention
showing the delivery device including a catheter and insertion needle before being
deployed;
Fig. 6 is a perspective view of the delivery device of Fig. 5 showing the catheter
deployed for delivering a substance to a patient;
Fig. 7 is a top perspective view of the base of a pump assembly in accordance with
one embodiment of the delivery device;
Fig. 8 is a bottom perspective view of the base of the base of Fig. 7;
Fig. 9 is a top perspective view of base of a pump assembly in another embodiment
of the invention;
Fig. 10 is a bottom perspective view of the base of the pump assembly of Fig. 9;
Fig. 11 is top perspective view of the base in cross section showing the noise dampening
member;
Fig. 12 is a top view of a noise dampening member in another embodiment formed as
a separate member that can be attached to the device;
Fig. 13 is an end view of the noise dampening member of Fig. 12;
Fig. 14 is a top view of a noise dampening member in a further embodiment formed as
a separate member that can be attached to the device; and
Fig. 15 is an end view of the noise dampening member of Fig. 14.
Detailed Description of Embodiments
[0024] Reference will now be made in detail to embodiments of the present invention, which
are illustrated in the accompanying drawings, wherein like reference numerals refer
to like elements throughout. The embodiments described herein exemplify, but do not
limit, the present invention by referring to the drawings.
[0025] It will be understood by one skilled in the art that this disclosure is not limited
in its application to the details of construction and the arrangement of components
set forth in the following description or illustrated in the drawings. The embodiments
herein are capable of other embodiments, and capable of being practiced or carried
out in various ways. Also, it will be understood that the phraseology and terminology
used herein is for the purpose of description and should not be regarded as limiting.
The use of "including," "comprising," or "having" and variations thereof herein is
meant to encompass the items listed thereafter and equivalents thereof as well as
additional items. Unless limited otherwise, the terms "connected," "coupled," and
"mounted," and variations thereof herein are used broadly and encompass direct and
indirect connections, couplings, and mountings. In addition, the terms "connected"
and "coupled" and variations thereof are not restricted to physical or mechanical
connections or couplings. Further, terms such as up, down, bottom, and top are relative,
and are employed to aid illustration, but are not limiting. The features discloses
in connection with one embodiment can be combined with another embodiment without
departing from the scope of the disclosure or the invention.
[0026] Fig. 1 is a perspective view of an exemplary embodiment of the delivery device shown
as an infusion pump or a patch pump 1. The patch pump 1 is illustrated with a see-through
cover for clarity and illustrates various components that are assembled to form the
patch pump 1. Fig. 2 is an exploded view of the various components of the patch pump
of Fig. 1, illustrated with a solid cover 2. The various components of the patch pump
1 may include a reservoir 4 for storing insulin, a pump mechanism 3 having a gearbox
for pumping a substance such as insulin from the reservoir 4, a power source 5 in
the form of one or more batteries, an insertion mechanism 7 for inserting an inserter
needle with a catheter into a user's skin, control electronics 8 in the form of a
circuit board with optional communications capabilities to outside devices such as
a remote controller and computer, including a smart phone, a dose button 6 on the
cover 2 for actuating an insulin dose, including a bolus dose, and a base 9 to which
various components above may be attached via fasteners 91. The patch pump 1 also includes
various fluid connector lines that transfer insulin pumped out of the reservoir 4
to the infusion site.
[0027] It should be understood that inserter mechanisms come in various configurations.
In some embodiments, the inserter mechanism inserts a soft catheter into the skin.
In these embodiments, typically the soft catheter is supported on a rigid insertion
needle. The insertion needle is inserted into the skin along with the soft catheter,
and then retracted from the skin, leaving the soft catheter in the skin. In other
embodiments, a soft catheter is not provided, and the insertion needle remains in
the skin and forms a portion of the insulin flow path to deliver insulin until the
infusion is finished. Insertion needles are typically hollow, and need to be hollow
if they form part of the insulin flow path. However, insertion needles that support
a soft catheter and then retract may be solid or hollow. If the insertion needle deploys
a soft catheter, and retracts but remains part of the insulin flow path, then the
insertion needle should be hollow. However, if the insertion needle deploys a soft
catheter and then retracts but does not form part of the insulin flow path, then the
insertion needle may be solid or hollow. In either case, the insertion needle is preferably
rigid enough to penetrate the skin reliably, but otherwise may be made flexible enough
to provide comfort to the user.
[0028] Fig. 3 is a perspective view of an alternative design for a patch pump lAhaving a
flexible reservoir 4A, and illustrated without a cover. Such arrangement may further
reduce the external dimensions of the patch pump 1A, with the flexible reservoir 4A
filling voids within the patch pump 1A. The patch pump 1A is illustrated with a conventional
cannula insertion device 7A that inserts the cannula, typically at an acute angle,
less than 90 degrees, at the surface of a user's skin. The patch pump 1A further comprises:
a power source 5A in the form of batteries; a metering sub-system 41 that monitors
the volume of insulin and includes a low volume detecting ability; control electronics
8A for controlling the components of the device; and a reservoir fill port 43 for
receiving a refill syringe 45 to fill the reservoir 4A.
[0029] Fig. 4 is a patch-pump fluidic architecture and metering sub-system diagram of the
patch pump 1A of Fig. 3. The power storage sub-system for the patch pump 1A includes
batteries 5A. The control electronics 8A of the patch pump 1A may include a microcontroller
81, sensing electronics 82, pump and valve controller 83, sensing electronics 85,
and deployment electronics 87 that control the actuation of the patch pump 1A. The
patch pump lA includes a fluidics sub-system that may include a reservoir 4A, volume
sensor 48 for the reservoir 4A, a reservoir fill port 43 for receiving a refill syringe
45 to refill the reservoir 4A. The fluidics sub-system may include a metering system
comprising a pump and valve actuator 411 and an integrated pump and valve mechanism
413. The fluidics sub-system may further include an occlusion sensor, a deploy actuator,
as well as the cannula 47 for insertion into an infusion site on the user's skin.
The architecture for the patch pumps of Figs. 1 and 2 is the same or similar to that
which is illustrated in Fig. 4.
[0030] Referring to Fig. 5 an embodiment of a delivery device 100 is shown having a housing
102 and an actuator button 104 for deploying the delivery cannula shown as a catheter
and insertion needle into the patient. The delivery device 100 is typically a patch
pump as in Figs. 1-4. The delivery cannula shown with a catheter insertion mechanism,
pump mechanism, and gearbox, operating system such as one or more circuit boards and
other components needed to deliver the insulin or other substance to the patient.
Fig. 6 is a perspective view of the delivery device 100 after the actuator button
104 is pressed to insert the catheter 106 into the patient for delivering the substance
to the patient. The delivery device has bottom wall defined by a base 108 that is
coupled to the housing 102 and encloses the mechanical components for the delivery
device including the pump and gearbox mechanism, pump motor, insertion needle, and
catheter 106. For clarity, the components of the pump and delivery mechanism are not
shown in Figs. 5 and 6. It is to be understood that the pump, pump motor and other
components of the delivery device are similar to the embodiment shown in Figs. 1-4
and are mounted on or attached to the base 108.
[0031] In an embodiment the user is able to insert the soft catheter and retract the introducer
needle by depressing the actuator button of the device. Generally, no other interaction
with the device is needed for catheter deployment and the initiation of medicament
delivery. In other embodiments, subsequent to placement of the patch pump on the patient's
skin and dosage setting, for example, by a remote device, the only required user interaction
with the patch pump to insert the soft catheter, retract the introducer needle, and
begin medicament delivery is to depress the button.
[0032] Fig. 7 is a top perspective view of the base 108 and Fig. 8 is a bottom perspective
view of the base in one embodiment. The base 108 is configured to couple to the housing
102 to enclose the various components of the delivery device including the pump mechanism
4 of Fig. 2. As shown in Fig. 7, the base 108 includes mounting posts 110 or other
supports for coupling to the components of the pump mechanism 4. The posts 110 project
from the top face 112 of the base and are oriented to mount the components of the
pump mechanism 4 to the base 108. The posts 110 are positioned for supporting the
components of the delivery device including the pump, pump motor, gear box or drive
mechanism for the pump, electronic components, switches, timers and batteries. In
the embodiment shown in Fig. 7, the posts 110 are spaced apart a distance for supporting
the pump mechanism and motor for the pump mechanism.
[0033] In the embodiment shown in Fig. 7, a recess 114 is formed in the top face 112 between
the posts 110. The recess 114 has a shape and configuration complementing the shape
and configuration of the pump mechanism, gearbox or drive mechanism, and the motor
for operating the pump mechanism. A noise reducing component of the device is provided
by a noise dampening member 116 in the recess 114 to be positioned between the base
108 and the mechanical components such as the pump mechanism, gearbox, or motor for
operating the pump mechanism. The noise dampening member 116 is generally positioned
proximate the moving components and noise producing components to absorb and dampen
noise and vibration and reduce noise and vibration from the delivery device that can
otherwise be perceived by the user. In the embodiment shown, the noise dampening member
116 is an elastomeric material that is sufficiently resilient to function as a noise
dampening and vibration dampening material to dampen the noise and vibration from
the components of the delivery device. The noise dampening material is typically applied
as a molded component in the recess 114 with a thickness sufficient to dampen the
noise and vibration produced by the pump mechanism, the gearbox of the pump mechanism,
and the pump motor.
[0034] In the embodiment shown in Fig. 7 and Fig. 8, the recess 114 is defined by an open
area in the base 108 where the open area extends between the top face 112 and the
bottom face 113. The noise dampening member 116 is molded in the recess 114 and attached
or bonded to the base. As shown in the embodiment of Fig. 7, the noise dampening member
116 has a top face 117 that is substantially flat and parallel to the top face 112
of the base 108.
[0035] As shown in the embodiment of Fig. 8, the molded noise dampening member 116 has a
bottom face 121 that is substantially aligned with the bottom face 113 of the base
108. The bottom face 121 of the noise dampening member 116 can be molded with a plurality
of tabs 119 integrally formed with the noise dampening member 116 and embedded within
or attached to the bottom face 113 of the base 108 to stabilize and mechanically attach
the noise dampening member 116 to the base 108. The bottom face 113 of the base 108
in this embodiment has a plurality of recesses to accommodate the tabs 119 of the
noise dampening member 116. The tabs 119 of the noise dampening member 116 are preferably
flush with the bottom face of the base and the bottom face of the noise dampening
member 116. The bottom face of the noise dampening member is generally flush with
the bottom face of the base to form a continuous surface for contacting the patient
during use.
[0036] In the embodiment shown, the base 108 is formed with the recess 114. The noise dampening
polymeric material is molded in the recess to form the noise dampening member 116
bonded to the base. The noise dampening member 116 can have a thickness corresponding
to the depth of the recess 114 and/or the thickness of the base 108. The noise dampening
member 116 can also have a thickness so that the top face 117 of the noise dampening
member 116 is recessed with respect to the top face 112 of the base 108 to define
a recessed area or cavity for accommodating one or more of the components of the pump
mechanism as shown in Fig. 11. In one embodiment, the recessed area has depth so that
the pump mechanism does not directly contact the noise dampening member 116. In other
embodiments, the noise dampening member can have a thickness to extend upward from
the top face 112 of the base 108 such that the top face of the noise dampening member
is aligned with or extends from the top face 112 of the base. In another embodiment,
the top face 112 of the base 108 can be substantially flat where the noise dampening
material can be formed as a layer on the top surface and extend upwardly from the
top face of the base 108. In the various embodiments, the noise and vibration producing
components of the pump mechanism are position above or proximate the noise dampening
member.
[0037] The noise dampening member 116 can be a suitable material that is able to absorb
and dampen the sound and vibration of the various components of the device and particularly
the moving mechanical components of the motor, pump mechanism, and gearbox for operating
the pump mechanism. In one embodiment, the noise dampening material is an elastomeric
material that is able to reduce the transfer of the vibration, noises, and sounds
produced by the components of the pump mechanism through the base and housing. The
noise dampening material can be a thermoplastic elastomeric polymer that can be molded
directly in or on the base 108 and/or in the recess 114. An example of the thermoplastic
elastomer can be a polyurethane elastomer that can be molded, bonded, or coated on
the rigid plastic that is used to form the base 108. Other examples of elastomers
as the noise dampening material include natural rubber, polybutadiene, neoprene, silicones,
polyisobutylene, and styrene-butadiene. The noise dampening material can be flexible
to conform to the shape of the surface that supports the noise dampening member.
[0038] In one embodiment, the base 108 is an injection molded part made from a rigid plastic
material that is able to support and protect the components of the device 100. The
noise dampening material can then be molded in the recess 114, onto the base 108,
or on other parts by a two-shot molding process as known in the art to apply the noise
dampening material to one or more areas on the base 108 or other parts of the device.
The noise dampening member 116 is bonded to the supporting surface of the base 108
by the molding process. Alternatively, the noise dampening material is pre-formed
and adhered by a suitable bonding method. In one embodiment, the noise dampening material
is applied to selected locations in areas supporting the components that are likely
to produce vibrations and sounds that can transfer through the base 108 and/or housing
102. The location of the noise dampening material is selected to absorb vibrations
and sounds from mechanical components of the device and reduce the vibrations and
sounds perceived by the user. The noise dampening material in one embodiment is selected
to be able to adhere sufficiently to the base 108 or other part during use of the
device.
[0039] In the embodiment shown in Fig. 7, guides 118 are provided that project upwardly
from the top face 112 of the base 108 in the vicinity of the noise dampening material
116 and between the posts 110. The guides 118 form members for guiding and mating
with the outer cover or housing of the device during assembly. Referring to Fig. 7,
shelves 150 are formed with the posts 110 for supporting the pump mechanism, motor,
and the gearbox mechanism for the pump mechanism. In the embodiment shown, the shelves
150 have a height to support the motor and gearbox and space the motor and gearbox
from the top face of the base 108 and from the top face 117 of the noise dampening
material 116. The pump motor and gearbox are generally supported by the posts 110
and the shelves 150 above the noise dampening member without the pump motor and gearbox
in direct contact with the top face 112 of the base 108 or the top face 117 of the
noise dampening member 116 to reduce vibrations and noise from transferring through
the base and housing 102. The noise dampening member 116 is oriented on or in the
base 108 to dampen vibrations or sounds of the, pump, motor and/or gearbox or other
mechanical components that can be undesirable to the patient. In other embodiments,
the motor and gearbox can contact the noise dampening member 116 where the noise dampening
material is able to absorb vibrations and noise from the components.
[0040] In the embodiment of Figs. 7 and 8, supports 120 are provided at an end portion of
the base 108 for supporting printed circuit boards 121 or other electronic components
for operating the motor and pump mechanism. Anoise dampening member 122 formed from
the noise dampening material is provided between supports 120 to absorb and dampen
vibrations and noise produced in the device 100. In the embodiment shown, two noise
dampening members 122 are formed at opposite corners of the base 108. In other embodiments
the number and location of the noise dampening members 122 can vary depending on the
construction of the device and location of the components.
[0041] In the embodiment shown, the noise dampening members 122 are formed in corresponding
recesses 124 formed in the top face 112 of the base 108. The noise dampening material
can be molded within the recesses 124 with the top face 126 of the noise dampening
member 122 formed substantially flush with the top face 112 of the base 108. In other
embodiments, the noise dampening material can be applied directly on the top face
112 to extend upward from the top face 112 a distance to provide a thickness sufficient
to dampen vibrations and noise from the various components of the device. In other
embodiments, the top face of the noise dampening member 122 can be recessed relative
to the top face of the base.
[0042] In the embodiment shown, the recesses 124 define openings extending through the base
between the top face 112 and the bottom face 113 of the base 108. The noise dampening
members 122 are molded in the recesses 124 with the top face 126 of the noise dampening
members 122 aligned with and substantially flush with the top face 112 of the base
108. The bottom face 128 of the noise dampening members 128 are aligned with and substantially
flush with the bottom face 113 of the base 108.
[0043] The recess 124 as shown in the bottom view of Fig. 8 is formed by side walls extending
between the top face 112 and bottom face 113 of the base 108. A plurality of tabs
119 forming lugs are molded integrally with the noise dampening member 116 and extend
outwardly to cooperate with the bottom face 113 of the base 108 to assist in mechanically
attaching the noise dampening member 116 to the base 108. Tabs 127 are molded on the
bottom face 122 of the noise dampening member 122 and extend outward and contact the
bottom face 113 of the base 108 for mechanically attaching the noise dampening member
122 to the base 108.
[0044] Another embodiment of the invention is shown in Figs 9-11 where a base 130 is configured
for coupling to the housing 102 of the device and supporting the components of the
device. As shown in Fig. 9, a recess 132 is formed in the top face 134 of the base
130 receiving a noise dampening member 136 formed from a noise and vibration absorbing
material. As in the previous embodiment the noise dampening material is typically
a thermoplastic elastomer such a polyurethane elastomer. The recess 132 in the embodiment
shown is defined by an opening that extends through the base 130 between the top face
134 and the bottom face 142 of the base 130 as shown in the cross section of Fig.
11.
[0045] In the embodiment of Fig. 9 and Fig. 11, the noise dampening member 136 has a thickness
relative to the depth of the recess 132 and thickness of the base 130 so that the
top face 160 of the noise dampening member 136 is recessed with respect to the top
face 134 of the base 130 to form a recessed area to accommodate the pump mechanism.
Alternatively, the top face 160 can be flush with the top face 134 of the base 130.
The bottom face 162 of the noise dampening member 136 is also shown as being aligned
with and substantially flush with the bottom face 142 of the base 130 as shown in
Fig. 10 and Fig. 11. Posts 138 form supports that project upward from the top face
134 for supporting mechanical components such as the pump mechanism and gearbox of
the pump mechanism. Shelves 140 are oriented around the perimeter of the recess 132
and the noise dampening member 136 for supporting one or more components of the device
and to form a gap or space between the noise dampening member 136 and the mechanical
components of the device. In the embodiment shown, the shelves 140 are formed with
the posts 138 and oriented above the top face of the noise dampening member 136 to
space the components of the device from the top face 134 of the base 130 and space
the components from the top face 160 of the noise dampening member 136. The top face
of the noise dampening member 136 can be recessed relative to the top face of the
based to form the recess area or cavity to accommodate a portion of one or more components
of the pump mechanism.
[0046] As shown in Fig. 9, the noise dampening member 136 is formed with a plurality of
projecting tabs 164 that extend upward from the top face 160 of the noise dampening
member 136. In the embodiment shown, four such tabs 164 are provided that are formed
with a substantially flat top face 166. As shown in Fig. 9, the tabs 164 are spaced
around the perimeter of the noise dampening member 136 and extend outward from the
perimeter to overlie and contact the top face 134 of the base 130. The tabs 164 are
integrally formed with the noise dampening member 136 to assist in mechanically attaching
to the base 108.
[0047] In the embodiment of Figs 9 and 10, the base 130 includes a second noise dampening
member 170 at an end portion of the base 130 in the area where the printed circuit
boards or other electronic components are supported within the device. As shown in
Figs. 9 and 11, the base 130 is provided with a recess 172 formed by an opening extending
through the base 130 and extending between the top face 134 and bottom face 142 of
the base 130. The noise dampening member 170 is molded from an elastomeric material
within the recess. In the embodiment shown in Fig. 10, the bottom face 176 of the
noise dampening member 170 is aligned with and substantially flush with the bottom
face 142 of the base 130.
[0048] Referring to Figs. 9 and 11, the noise dampening member 170 has a thickness greater
than the thickness of the base 130 where the top face 178 of the noise dampening member
170 extends above the top face 142 of the base 130. The top face 178 of the noise
dampening member 170 is formed with a plurality of tabs 180 that extend outwardly
from the side of the noise dampening member 170 to overlie the top face 142 of the
base 130 as shown in Figs. 9 and 11 for mechanically attaching to the base.
[0049] Figs. 12 and 13 illustrate a further embodiment where the noise dampening member
190 is formed as a separate member and attached or bonded to the device in a suitable
location to provide the desired noise dampening and vibration dampening properties.
In the embodiment shown in Fig. 12, the noise dampening member 190 is formed as a
sheet-like member having an outer or top side 192 and an inner or bottom side 194
having an adhesive or mastic 196 applied to the bottom side for attaching to the selected
surface of device. In the embodiment shown, the noised dampening member 190 has shape
complementing the shape and dimension of the base and has a thickness sufficient to
provide the desired level of noise dampening without interfering with the mounting
of the components of the device. The adhesive 196 can be applied to the entire surface
of the noise dampening member or only to selected portions depending on the requirements
for the device. The noise dampening member can have a shape and dimension to fit in
a suitable location in or on the device to dampen sounds. The noised dampening member
can be attached to an inner surface of the base within the cavity of the device on
an outer face of the base.
[0050] Figs. 14 and 15 illustrate another embodiment of the invention where the noise dampening
member 200 has a shape and configuration to cover a portion of the base of the device.
The noise dampening member 200 has an outer edge 202 configured to complement the
outer dimension of the base with a plurality of cut-outs 204 and openings 206 to accommodate
the various tabs, supports and components of the device that project from or are supported
by the base as in the previous embodiments. As shown in Fig. 15 an adhesive or mastic
layer 208 is applied to a bottom side 210 of the noise dampening member 200 for attaching
directly to the base.
[0051] The noise dampening materials can be formed from a thermoplastic elastomer as in
the previous embodiments and have a thickness and dimension to provide sufficient
noise dampening from the mechanical components in the device. In other embodiments,
the noise dampening member can have a dimension complementing the dimensions of the
top face of the base. In other embodiments, the noise dampening member can be attached
to a top surface of the base have a dimension less than the dimension of the top face
of the base. In further embodiments, the noise dampening member can be attached to
or bonded to a surface of the housing or cover in a selected location to provide the
desired noise dampening property.
[0052] In the embodiments illustrated, the noise dampening member can be molded or formed
within the base and located or positioned at a suitable location where the noise dampening
member can dampen the sounds produced by the pump mechanism or outer components that
can produce sounds and/or vibrations that can be perceived by the user. The noise
dampening material member can be molded in a recess or opening formed in the base
and attached directly to the base by suitable mechanisms. The noise dampening member
can be spaced from the moving mechanical components or can be positioned between the
mechanical components and the base to reduce the noise and vibrations from transferring
to the base. In the embodiment shown, the noise dampening member has at least one
surface facing the components of the pump mechanism.
[0053] Generally the thickness and dimension of the noise dampening member provide the desired
noise dampening properties. In the embodiment where the noise dampening member is
positioned between the pump mechanism or other noise producing component and the base,
the thickness of the noise dampening member is limited by the position of the mechanical
components. Where the noise dampening member is positioned in other locations, the
thickness of the noise dampening member can be increased to increase the noise dampening
properties. The dimension of the noise dampening member can be a suitable size to
fit within the boundary or perimeter of the base or other part without interfering
with the operation of the device. In other embodiments, the noise dampening member
can be attached to a bottom face of the base or at other locations on the outer or
inner surfaces of the device.
[0054] Although only a few embodiments of the present invention have been shown and described,
the present invention is not limited to the described embodiments. Instead, it will
be appreciated by those skilled in the art that changes may be made to these embodiments
without departing from the principles and spirit of the invention. It is particularly
noted that those skilled in the art can readily combine the various technical aspects
of the various elements of the various exemplary embodiments that have been described
above in numerous other ways, all of which are considered to be within the scope of
the invention, which is defined by the appended claims and their equivalents. Features
of the different embodiments can be combined with other embodiments or features as
long as they do not contradict each other.
1. A delivery device, comprising:
a housing;
a base coupled to said housing, said base configured for supporting a pump mechanism,
a cannula configured for delivering a substance to a patient, said cannula connected
to said pump mechanism, and a reservoir for the substance to be delivered to the patient,
and said reservoir connected to said pump mechanism;
said base configured for supporting at least one component of said pump mechanism,
said base having at least one noise dampening member oriented to dampen noise produced
by said at least one component of said pump mechanism.
2. The device according to claim 1, wherein delivery device is a catheter and said noise
dampening member is an elastomeric material, and where said at least one component
of said pump mechanism is mounted over said elastomeric material.
3. The device according to claim 1, wherein said noise dampening member is a thermoplastic
elastomeric material attached or adhered to said base, wherein said thermoplastic
elastomeric material is preferably molded directly to a surface of said base within
a boundary of said base.
4. The device according to claim 1, wherein said noise dampening material is positioned
in said base or on said base, and is oriented between said base and said pump mechanism.
5. The device according to claim 4, wherein said at least one component of said pump
mechanism is a gear box or electric motor of said pump mechanism.
6. The device according to claim 1, wherein said noise dampening member is spaced from
said pump mechanism or wherein said noise dampening member is formed as separate member
attached to said base by bonding or by an adhesive.
7. The device according to claim 1, wherein said base has a top face coupled to said
housing and where said base includes a recess in said top face and where said noise
dampening material is provided in said recess, and where said noise dampening member
has a top face spaced from a top face of said base to define a recessed area in said
top face to accommodate said pump mechanism.
8. The device according to claim 1, further comprising a plurality of said noise dampening
members formed in or on said base.
9. A delivery device comprising:
a housing;
a base coupled to said housing and defining an enclosure for accommodating a pump
mechanism for delivering a substance to a patient, said base having a top face supporting
said pump mechanism, and a bottom face; and
at least one noise dampening member formed in or on said base, and where said pump
mechanism is coupled to said top face of said base over said noise dampening member.
10. The device according to claim 9, wherein said noise dampening member is a thermoplastic
elastomeric material.
11. The device according to claim 9, wherein said delivery device is a catheter infusion
pump comprising a catheter connected to a pump mechanism for delivering the substance
to the patient.
12. The device according to claim 9, wherein said at least one noise dampening member
is formed in a recess in said base and adhered directly to a surface of said base.
13. The device of claim 9, wherein said noise dampening member has a dimension and configuration
complementing at least one component of the pump mechanism and is oriented between
said base and said pump mechanism.
14. The device of claim 13, wherein said at least one component of said pump mechanism
is a gear box or electric motor of said pump mechanism and/or wherein said at least
one noise dampening member is oriented within a boundary of said base.
15. The device of claim 9, wherein said base has a top face coupled to said housing, and
where said top face has a plurality of said noise dampening member in said base or
on a top face of said base, and where at least one of said noise dampening members
is spaced from said pump mechanism.
16. The device of claim 9, wherein said base has top face coupled to said housing and
where said base has a recess in said top face and where said noise dampening member
is formed in said recess, wherein said noise dampening member preferably has a top
face spaced outwardly from said top face of the base.
17. The device of claim 9, wherein said noise dampening member is formed as a separate
member and is attached to a top face of said base by bonding or by an adhesive, wherein
said noised dampening member preferably has a top side and a bottom side for mating
with the base, and where said bottom side preferably has an adhesive layer for attaching
said noise dampening member to said base.